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Total Surface Area, by Land Cover/Use, by Region and Year

Estimates presented here are based upon the latest information from the National Resources Inventory (NRI). The NRI is a longitudinal sample survey based upon scientific statistical principles and procedures. It is conducted by the U.S. Department of Agriculture’s Natural Resources Conservation Service (NRCS), in cooperation with Iowa State University’s Center for Survey Statistics and Methodology. These results are based upon the 2007 NRI, which provides nationally consistent data for the 25-year period 1982–2007. Estimates here cover the contiguous 48 states. Separate estimates include Hawaii, Alaska, and the Caribbean.

Margins of error are reported for each NRI estimate and must be considered at all scales of analysis. The margin of error is used to construct the 95 percent confidence interval for the estimate. The lower bound of the interval is obtained by subtracting the margin of error from the estimate; the upper bound is obtained by adding the margin of error to the estimate. A 95 percent confidence interval means that in repeated samples from the same population, 95 percent of the time the true underlying population parameter will be contained within the lower and upper bounds of the interval.

Table 25. Total Surface Area, by Land Cover/Use, by Farm Production Region and Year, in Thousands of Acres, with Margins of Error
Region Year Cropland CRP Land Pastureland Rangeland Forest Land Other Rural Land Total Non-Federal Rural Land Developed Land Water Areas Federal Land Total Surface Area
Appalachian 1982 22,590.5
±346.9
--
18,317.4
±387.5
0.0
--
63,535.6
±383.7
2,774.7
±155.2
107,218.2
±184.1
7,556.6
±184.7
6,150.2
--
8,216.6
--
129,141.6
--
1987 21,188.4
±377.2
432.4
--
17,916.3
±382.8
0.0
--
63,509.9
±439.7
2,777.6
±146.8
105,824.6
±202.0
8,676.2
±202.9
6,176.0
--
8,464.8
--
129,141.6
--
1992 19,638.3
±347.8
1,074.4
--
17,825.6
±392.0
0.0
--
63,105.5
±458.9
2,631.8
±150.5
104,275.6
±211.5
9,864.0
±213.0
6,219.2
--
8,782.8
--
129,141.6
--
1997 19,167.1
±336.5
908.3
--
17,147.9
±354.4
0.0
--
62,684.9
±466.8
2,635.1
±126.3
102,543.3
±221.2
11,568.7
±218.3
6,244.9
--
8,784.7
--
129,141.6
--
2002 18,904.8
±557.7
642.2
--
16,385.7
±547.0
0.0
--
62,057.6
±497.4
2,743.2
±180.9
100,733.5
±253.3
13,149.5
±260.2
6,294.8
--
8,963.8
--
129,141.6
--
2007 18,073.4
±558.2
669.7
--
16,478.0
±528.5
0.0
--
61,542.5
±581.2
2,904.6
±271.2
99,668.2
±321.4
14,180.9
±326.5
6,328.7
--
8,963.8
--
129,141.6
--
Corn Belt 1982 92,236.2
±545.4
--
25,266.9
±483.8
129.0
±46.3
27,577.8
±429.2
3,987.7
±113.5
149,197.6
±263.7
11,052.7
±260.6
2,668.7
--
3,373.3
--
166,292.3
--
1987 90,892.3
±549.4
2,127.8
--
23,412.2
±478.5
92.2
±39.5
28,270.6
±439.3
3,799.2
±118.4
148,594.3
±270.0
11,644.1
±267.5
2,712.4
--
3,341.5
--
166,292.3
--
1992 87,710.9
±561.6
5,130.6
--
22,490.9
±478.2
87.5
±39.8
28,721.9
±427.4
3,753.6
±120.6
147,895.4
±283.9
12,258.8
±283.4
2,744.0
--
3,394.1
--
166,292.3
--
1997 87,950.6
±557.6
4,770.7
--
20,829.4
±466.5
77.8
±38.8
29,344.4
±397.3
3,765.9
±99.5
146,738.8
±283.6
13,373.1
±283.2
2,756.3
--
3,424.1
--
166,292.3
--
2002 87,703.4
±623.0
4,147.8
--
20,527.1
±617.6
77.7
±39.3
29,762.9
±473.0
3,716.2
±164.2
145,935.1
±282.9
14,108.6
±282.3
2,820.0
--
3,428.6
--
166,292.3
--
2007 86,917.4
±738.1
3,990.4
--
20,707.2
±622.3
83.1
±39.7
29,635.9
±695.2
3,870.0
±204.3
145,204.0
±344.7
14,793.4
±353.8
2,866.3
--
3,428.6
--
166,292.3
--
Delta States 1982 21,873.7
±609.3
--
11,958.4
±383.7
255.7
±65.0
43,559.6
±600.7
3,622.3
±178.4
81,269.7
±166.0
3,587.6
±158.8
5,226.7
--
5,857.0
--
95,941.0
--
1987 20,876.6
±586.7
435.1
--
11,773.1
±364.8
251.9
±64.4
43,742.4
±600.4
3,670.9
±171.1
80,750.0
±164.5
3,851.1
±159.2
5,377.6
--
5,962.3
--
95,941.0
--
1992 19,369.1
±543.8
1,159.9
--
11,855.5
±371.4
246.3
±61.7
43,957.0
±600.3
3,667.0
±162.1
80,254.8
±167.4
4,062.6
±158.6
5,461.1
--
6,162.5
--
95,941.0
--
1997 18,571.8
±558.6
1,168.1
--
11,497.8
±336.0
239.8
±64.8
44,423.1
±570.3
3,739.3
±168.7
79,639.9
±189.2
4,598.5
±174.7
5,522.0
--
6,180.6
--
95,941.0
--
2002 17,784.8
±591.7
1,155.2
--
11,062.1
±400.4
262.3
±110.1
44,962.9
±605.4
3,809.8
±158.5
79,037.1
±217.0
5,082.6
±192.6
5,612.3
--
6,209.0
--
95,941.0
--
2007 17,190.7
±614.5
1,162.9
--
10,874.9
±540.9
258.8
±88.4
45,229.2
±659.1
3,815.3
±183.9
78,531.8
±232.0
5,484.0
±210.5
5,716.2
--
6,209.0
--
95,941.0
--
Lake States 1982 43,778.8
±702.5
--
10,281.8
±354.1
0.0
--
46,457.0
±725.8
6,377.2
±192.0
106,894.8
±187.2
6,529.3
±177.2
5,514.6
--
8,340.4
--
127,279.1
--
1987 42,907.5
±746.9
1,052.3
--
9,382.8
±287.1
0.0
--
46,629.5
±727.2
6,411.7
±203.4
106,383.8
±193.5
6,976.6
±182.3
5,521.7
--
8,397.0
--
127,279.1
--
1992 41,104.3
±695.8
2,736.2
--
8,847.9
±276.4
0.0
--
46,734.3
±738.2
6,389.0
±199.1
105,811.7
±200.8
7,483.5
±189.8
5,527.6
--
8,456.3
--
127,279.1
--
1997 40,478.8
±755.6
2,526.6
--
8,431.0
±293.7
0.0
--
47,204.6
±742.4
6,379.8
±207.3
105,020.8
±205.3
8,282.4
±198.6
5,519.6
--
8,456.3
--
127,279.1
--
2002 39,439.9
±695.6
2,298.7
--
8,717.9
±405.2
0.0
--
47,616.6
±685.1
6,316.7
±276.2
104,389.8
±220.5
8,891.4
±215.7
5,542.7
--
8,455.2
--
127,279.1
--
2007 38,560.9
±825.1
2,186.7
--
9,135.1
±623.3
0.0
--
47,708.8
±681.2
6,327.0
±305.2
103,918.5
±250.7
9,347.7
±247.2
5,557.9
--
8,455.0
--
127,279.1
--
Mountain 1982 43,125.8
±1,071.4
--
7,453.0
±629.0
191,145.7
±2,106.5
25,983.6
±1,488.4
10,405.3
±940.2
278,113.4
±386.3
5,502.2
±371.6
4,885.7
--
264,213.2
--
552,714.5
--
1987 40,240.2
±1,038.3
3,761.8
--
7,561.2
±591.9
189,299.4
±2,061.2
25,843.1
±1,516.8
10,522.7
±938.4
277,228.4
±432.2
6,071.5
±415.2
5,484.3
--
263,930.3
--
552,714.5
--
1992 37,412.6
±1,036.9
6,484.0
--
7,962.0
±638.1
188,686.7
±2,075.4
25,605.3
±1,493.4
10,942.9
±929.3
277,093.5
±448.5
6,568.6
±432.7
4,907.3
--
264,145.1
--
552,714.5
--
1997 37,068.7
±1,064.9
6,327.8
--
8,322.6
±663.0
187,677.1
±2,223.8
25,794.0
±1,626.0
11,157.4
±865.4
276,347.6
±473.5
7,227.4
±457.4
4,921.1
--
264,218.4
--
552,714.5
--
2002 34,814.8
±1,029.8
7,319.0
--
7,936.8
±884.8
188,406.6
±2,298.9
25,520.5
±1,652.6
11,224.6
±869.4
275,222.3
±632.3
8,342.4
±616.2
4,927.2
--
264,222.6
--
552,714.5
--
2007 33,023.1
±1,325.3
7,630.9
--
8,196.7
±1,250.3
188,861.5
±2,462.5
25,464.9
±1,713.1
11,204.7
±982.7
274,381.8
±735.4
9,165.3
±727.8
4,944.8
--
264,222.6
--
552,714.5
--
Northeast 1982 16,736.8
±379.6
--
8,539.6
±201.2
0.0
--
68,179.1
±416.2
3,637.7
±209.2
97,093.2
±229.5
11,109.5
±223.1
6,574.7
--
2,605.4
--
117,382.8
--
1987 16,240.9
±407.0
34.7
--
7,722.8
±214.7
0.0
--
68,294.9
±436.2
3,778.2
±203.6
96,071.5
±244.3
12,056.1
±235.6
6,584.1
--
2,671.1
--
117,382.8
--
1992 15,706.0
±405.4
204.3
--
7,051.5
±219.5
0.0
--
68,222.1
±471.3
3,761.0
±192.1
94,944.9
±251.0
13,110.3
±242.3
6,602.7
--
2,724.9
--
117,382.8
--
1997 15,141.6
±425.7
194.0
--
6,095.1
±215.9
0.0
--
68,137.1
±501.4
3,586.0
±180.0
93,153.8
±284.4
14,857.7
±273.9
6,611.9
--
2,759.4
--
117,382.8
--
2002 14,332.3
±421.7
149.7
--
6,115.2
±271.5
0.0
--
67,898.4
±531.1
3,493.0
±213.9
91,988.6
±311.9
15,972.2
±302.5
6,636.1
--
2,785.9
--
117,382.8
--
2007 13,707.6
±450.5
141.1
--
6,206.0
±309.4
0.0
--
67,644.9
±572.1
3,526.9
±225.5
91,226.5
±345.0
16,720.7
±334.8
6,649.7
--
2,785.9
--
117,382.8
--
Northern Plains 1982 93,324.4
±662.7
--
7,930.7
±366.3
74,720.0
±832.2
3,289.8
±166.5
4,400.0
±224.1
183,664.9
±160.0
4,476.8
±150.1
2,810.9
--
5,826.5
--
196,779.1
--
1987 93,022.9
±655.7
2,108.7
--
7,480.8
±324.7
73,220.9
±818.6
3,308.5
±163.5
4,396.1
±212.4
183,537.9
±160.9
4,531.1
±151.0
2,823.9
--
5,886.2
--
196,779.1
--
1992 86,859.7
±742.0
8,903.5
--
7,527.7
±348.1
72,097.6
±891.5
3,383.8
±161.0
4,417.4
±216.1
183,189.7
±181.4
4,715.9
±170.7
2,827.1
--
6,046.4
--
196,779.1
--
1997 87,669.3
±731.4
8,580.5
--
7,185.3
±286.3
71,592.3
±886.2
3,384.5
±161.9
4,466.7
±240.1
182,878.6
±193.9
4,942.2
±181.4
2,913.8
--
6,044.5
--
196,779.1
--
2002 87,105.9
±802.2
8,267.3
--
7,271.6
±501.1
72,036.4
±990.6
3,431.2
±168.6
4,566.3
±240.1
182,678.7
±201.1
5,072.4
±190.6
2,979.1
--
6,048.9
--
196,779.1
--
2007 85,877.8
±1,061.8
8,916.8
--
7,555.5
±475.0
72,103.0
±1,215.6
3,499.7
±225.3
4,590.9
±234.3
182,543.7
±217.9
5,188.2
±204.6
2,998.6
--
6,048.6
--
196,779.1
--
Pacific 1982 22,538.5
±725.7
--
4,680.9
±428.9
34,750.8
±1,296.2
40,696.5
±945.0
5,193.2
±646.1
107,859.9
±390.8
6,645.4
±389.8
4,199.9
--
89,001.3
--
207,706.5
--
1987 21,359.6
±788.2
977.7
--
4,805.9
±499.9
34,267.0
±1,364.9
40,622.8
±978.5
5,207.3
±646.8
107,240.3
±420.7
7,077.7
±420.6
4,327.3
--
89,061.2
--
207,706.5
--
1992 20,578.7
±754.4
1,736.3
--
4,469.6
±468.4
33,614.8
±1,326.5
40,244.1
±952.5
5,299.3
±642.2
105,942.8
±455.0
7,868.6
±456.3
4,064.4
--
89,830.7
--
207,706.5
--
1997 20,046.4
±816.7
1,672.8
--
4,273.0
±393.0
33,499.6
±1,402.9
39,869.4
±888.8
5,538.5
±655.3
104,899.7
±465.7
8,773.4
±465.1
4,216.2
--
89,817.2
--
207,706.5
--
2002 19,801.9
±860.8
1,862.9
--
3,939.6
±372.1
33,059.7
±1,357.0
39,799.9
±791.3
5,697.2
±568.0
104,161.2
±503.4
9,488.3
±504.0
4,234.1
--
89,822.9
--
207,706.5
--
2007 19,556.3
±981.3
2,061.1
--
3,734.4
±375.2
32,840.0
±1,495.2
39,716.3
±1,015.0
5,701.9
±553.8
103,610.0
±528.1
10,027.9
±525.2
4,245.7
--
89,822.9
--
207,706.5
--
Southeast 1982 18,229.1
±421.6
--
12,317.9
±373.3
4,461.9
±318.8
67,445.5
±569.8
4,557.2
±385.9
107,011.6
±307.6
7,982.2
±320.9
5,931.2
--
7,712.3
--
128,637.3
--
1987 16,464.5
±441.8
703.2
--
12,368.1
±396.1
4,132.8
±330.8
67,819.7
±571.4
4,542.0
±387.0
106,030.3
±326.0
8,891.8
±341.5
5,972.7
--
7,742.5
--
128,637.3
--
1992 14,362.0
±481.0
1,531.9
--
12,528.8
±400.6
3,596.7
±284.6
67,666.5
±611.1
4,695.0
±412.6
104,380.9
±350.7
10,283.8
±364.2
6,056.6
--
7,916.0
--
128,637.3
--
1997 13,065.4
±462.1
1,499.0
--
11,983.7
±407.9
3,285.4
±312.8
67,455.1
±620.0
4,853.8
±443.3
102,142.4
±373.6
12,451.5
±373.3
6,101.1
--
7,942.3
--
128,637.3
--
2002 12,274.8
±530.5
1,059.0
--
11,224.9
±466.4
2,954.6
±346.7
67,982.2
±571.1
4,676.2
±433.0
100,171.7
±424.7
14,299.3
±416.3
6,224.0
--
7,942.3
--
128,637.3
--
2007 11,327.4
±652.7
1,010.3
--
10,977.3
±772.7
2,709.3
±360.5
67,830.9
±685.3
4,774.6
±490.7
98,629.8
±540.7
15,770.6
±515.5
6,294.6
--
7,942.3
--
128,637.3
--
Southern Plains 1982 45,113.1
±776.8
--
24,149.7
±551.0
112,436.4
±959.8
16,655.1
±329.0
2,287.8
±188.2
200,642.1
±220.3
6,521.8
±222.9
4,695.3
--
3,930.8
--
215,790.0
--
1987 42,352.5
±750.0
2,181.3
--
24,298.8
±514.3
111,310.1
±986.4
17,293.6
±381.8
2,438.9
±188.9
199,875.2
±224.1
7,094.8
±225.8
4,857.4
--
3,962.6
--
215,790.0
--
1992 38,699.0
±790.6
5,132.4
--
24,459.3
±554.7
110,586.8
±1,010.3
17,654.3
±401.3
2,509.7
±196.2
199,041.5
±256.5
7,686.2
±260.1
5,004.1
--
4,058.2
--
215,790.0
--
1997 36,978.4
±787.4
5,042.7
--
24,014.9
±488.9
111,170.4
±963.9
18,299.6
±460.3
2,625.9
±208.2
198,131.9
±279.5
8,504.0
±282.3
5,095.9
--
4,058.2
--
215,790.0
--
2002 34,937.0
±837.5
5,088.5
--
24,602.1
±601.2
111,411.9
±908.7
18,224.2
±520.7
2,688.1
±183.8
196,951.8
±316.5
9,624.1
±323.2
5,155.9
--
4,058.2
--
215,790.0
--
2007 32,788.9
±991.3
5,080.3
--
24,750.6
±940.3
112,263.7
±1,347.4
18,137.3
±606.9
2,923.7
±267.2
195,944.5
±365.9
10,572.5
±367.1
5,214.8
--
4,058.2
--
215,790.0
--
Notes:
• Acreages for Conservation Reserve Program (CRP) land, water areas, Federal land, and total surface area are established through geospatial processes and administrative records; therefore, statistical margins of error are not applicable and shown as a dashed line (--).
• When the estimate is 0.0, margins of error are not applicable and shown as a dashed line (--).
• Total surface area of the contiguous United States is 1,937.7 million acres.
• CRP was not implemented until 1985.
• Cropland includes cultivated and non-cultivated cropland.

 

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